SAE-AISI 4340 Steel vs. ZA-27
SAE-AISI 4340 steel belongs to the iron alloys classification, while ZA-27 belongs to the zinc alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4340 steel and the bottom bar is ZA-27.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 360 | |
| 100 to 120 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 78 |
| Elongation at Break, % | 12 to 22 | |
| 2.0 to 4.5 |
| Fatigue Strength, MPa | 330 to 740 | |
| 110 to 170 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 73 | |
| 31 |
| Shear Strength, MPa | 430 to 770 | |
| 230 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1280 | |
| 400 to 430 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1150 | |
| 260 to 370 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 130 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 120 |
| Melting Completion (Liquidus), °C | 1460 | |
| 480 |
| Melting Onset (Solidus), °C | 1420 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 530 |
| Thermal Conductivity, W/m-K | 44 | |
| 130 |
| Thermal Expansion, µm/m-K | 13 | |
| 26 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.5 | |
| 30 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.6 | |
| 53 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.5 | |
| 11 |
| Density, g/cm3 | 7.8 | |
| 5.0 |
| Embodied Carbon, kg CO2/kg material | 1.7 | |
| 4.2 |
| Embodied Energy, MJ/kg | 22 | |
| 80 |
| Embodied Water, L/kg | 53 | |
| 570 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 79 to 170 | |
| 8.1 to 18 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 3490 | |
| 420 to 890 |
| Stiffness to Weight: Axial, points | 13 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 24 | |
| 28 |
| Strength to Weight: Axial, points | 24 to 45 | |
| 22 to 24 |
| Strength to Weight: Bending, points | 22 to 33 | |
| 24 to 25 |
| Thermal Diffusivity, mm2/s | 12 | |
| 47 |
| Thermal Shock Resistance, points | 20 to 38 | |
| 14 to 15 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 25 to 28 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0 |
| Chromium (Cr), % | 0.7 to 0.9 | |
| 0 |
| Copper (Cu), % | 0 | |
| 2.0 to 2.5 |
| Iron (Fe), % | 95.1 to 96.3 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0 | |
| 0.010 to 0.020 |
| Manganese (Mn), % | 0.6 to 0.8 | |
| 0 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 0 to 0.020 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.080 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 |
| Tin (Sn), % | 0 | |
| 0 to 0.0030 |
| Zinc (Zn), % | 0 | |
| 69.3 to 73 |